Inlet Temperature versus Airflow Requirement in Server

The following tables provide the required airflow rate and airflow speed to X3522 NICs under various operating conditions for 35W total card power. This is indicative of requirements for the X3522 low latency network adapter with hybrid mode disabled (its initial supplied state).

Table 1. Normal Flow (Exhaust Air from I/O Bracket) at Sea Level for 35W
Inlet Temperature vs Airflow Requirement of PCIe Card Slot (56.51 mm x 20.33 mm) at Sea Level for 35W Total Card Power
Inlet Temperature to the Card (°C)	With SFP28 (75°C)			Without SFP28¹
Inlet Temperature to the Card (°C)	CFM	LFM	Static Pressure	CFM	LFM	Static Pressure
25	1.4	110	0.08	1.4	120	0.09
30	1.6	130	0.10	1.7	140	0.11
35	2.0	160	0.12	2.1	170	0.13
40	2.5	210	0.17	2.6	220	0.18
45	3.3	270	0.24	3.5	290	0.26
50	4.6	380	0.38	4.9	400	0.41
55	7.3	600	0.74	7.7	630	0.80
A card without SFP28 allocates more power in the FPGA than one with SFP28.

Table 2. Normal Flow (Exhaust Air from I/O Bracket) at 1200m Above Sea Level for 35W
Inlet Temperature vs Airflow Requirement of PCIe Card Slot (56.51 mm x 20.33 mm) at 1200m Above Sea Level for 35W Total Card Power
Inlet Temperature to the Card (°C)	With SFP28 (75°C)			Without SFP28¹
Inlet Temperature to the Card (°C)	CFM	LFM	Static Pressure	CFM	LFM	Static Pressure
25	1.4	120	0.09	1.5	130	0.09
30	1.7	140	0.11	1.8	150	0.12
35	2.1	180	0.14	2.2	190	0.15
40	2.7	220	0.18	2.8	230	0.20
45	3.5	290	0.26	3.7	310	0.28
50	5.0	410	0.42	5.3	430	0.46
55	7.9	640	0.84	8.3	680	0.90
A card without SFP28 allocates more power in the FPGA than one with SFP28.

Table 3. Reverse Flow (Inlet Air from I/O Bracket) at Sea Level for 35W
Inlet Temperature vs Airflow Requirement of PCIe Card Slot (66.87 mm x 13.18 mm) at Sea Level for 35W Total Card Power
Inlet Temperature to the Card (°C)	With SFP28 (75°C)			Without SFP28¹
Inlet Temperature to the Card (°C)	CFM	LFM	Static Pressure	CFM	LFM	Static Pressure
25	0.7	70	0.04	0.8	80	0.04
30	0.8	80	0.04	0.9	90	0.04
35	0.9	100	0.05	1.0	110	0.05
40	1.0	110	0.07	1.1	130	0.06
45	1.2	130	0.09	1.4	150	0.08
50	1.5	160	0.12	1.6	180	0.10
55	1.6	180	0.14	1.8	190	0.11
60	2.1	220	0.20	2.2	240	0.16
A card without SFP28 allocates more power in the FPGA than one with SFP28.

Table 4. Reverse Flow (Inlet Air from I/O Bracket) at 1200m Above Sea Level for 35W
Inlet Temperature vs Airflow Requirement of PCIe Card Slot (66.87 mm x 13.18 mm) at 1200m Above Sea Level for 35W Total Card Power
Inlet Temperature to the Card (°C)	With SFP28 (75°C)			Without SFP28¹
Inlet Temperature to the Card (°C)	CFM	LFM	Static Pressure	CFM	LFM	Static Pressure
25	0.7	80	0.04	0.8	90	0.04
30	0.8	90	0.05	0.9	100	0.05
35	0.9	100	0.06	1.1	120	0.06
40	1.1	120	0.08	1.2	130	0.07
45	1.3	140	0.10	1.5	160	0.09
50	1.6	180	0.13	1.8	190	0.11
55	1.8	190	0.15	1.9	210	0.13
60	2.2	240	0.22	2.4	260	0.18
A card without SFP28 allocates more power in the FPGA than one with SFP28.

The following tables provide the required airflow rate and airflow speed to X3522 NICs under various operating conditions for 70W total card power. This is indicative of requirements for the X3522 low latency network adapter with hybrid mode enabled to make it programmable, and the X3522PV adaptable accelerator card.

Table 5. Normal Flow (Exhaust Air from I/O Bracket) at Sea Level for 70W
Inlet Temperature vs Airflow Requirement of PCIe Card Slot (56.51 mm x 20.33 mm) at Sea Level for 70W Total Card Power
Inlet Temperature to the Card (°C)	With SFP28 (75°C)			Without SFP28¹
Inlet Temperature to the Card (°C)	CFM	LFM	Static Pressure	CFM	LFM	Static Pressure
25	3.6	300	0.27	3.8	310	0.29
30	4.3	350	0.34	4.5	370	0.37
35	5.2	430	0.45	5.5	450	0.49
40	6.6	540	0.64	6.9	570	0.68
45	8.7	710	0.97	9.1	740	1.04
50	12.3	1000	1.69	12.8	1040	1.81
55	19.5	1580	3.67	20.2	1640	3.92
A card without SFP28 allocates more power in the FPGA than one with SFP28.

Table 6. Normal Flow (Exhaust Air from I/O Bracket) at 1200m Above Sea Level for 70W
Inlet Temperature vs Airflow Requirement of PCIe Card Slot (56.51 mm x 20.33 mm) at 1200m Above Sea Level for 70W Total Card Power
Inlet Temperature to the Card (°C)	With SFP28 (75°C)			Without SFP28¹
Inlet Temperature to the Card (°C)	CFM	LFM	Static Pressure	CFM	LFM	Static Pressure
25	3.9	320	0.30	4.1	330	0.32
30	4.6	380	0.38	4.9	400	0.41
35	5.6	460	0.50	5.9	480	0.54
40	7.1	580	0.71	7.5	610	0.76
45	9.4	760	1.09	9.8	800	1.17
50	13.3	1080	1.91	13.8	1120	2.05
55	21.1	1710	4.20	21.8	1770	4.48
A card without SFP28 allocates more power in the FPGA than one with SFP28.

Table 7. Reverse Flow (Inlet Air from I/O Bracket) at Sea Level for 70W
Inlet Temperature vs Airflow Requirement of PCIe Card Slot (66.87 mm x 13.18 mm) at Sea Level for 70W Total Card Power
Inlet Temperature to the Card (°C)	With SFP28 (75°C)			Without SFP28¹
Inlet Temperature to the Card (°C)	CFM	LFM	Static Pressure	CFM	LFM	Static Pressure
25	2.6	280	0.29	2.8	300	0.22
30	3.0	330	0.37	3.2	340	0.27
35	3.5	380	0.47	3.7	390	0.34
40	4.2	440	0.62	4.3	450	0.43
45	5.0	530	0.85	5.0	540	0.57
50	6.1	640	1.22	6.1	640	0.78
55	6.6	700	1.42	6.6	700	0.89
60	8.3	880	2.19	8.2	870	1.31
A card without SFP28 allocates more power in the FPGA than one with SFP28.

Table 8. Reverse Flow (Inlet Air from I/O Bracket) at 1200m Above Sea Level for 70W
Inlet Temperature vs Airflow Requirement of PCIe Card Slot (66.87 mm x 13.18 mm) at 1200m Above Sea Level for 70W Total Card Power
Inlet Temperature to the Card (°C)	With SFP28 (75°C)			Without SFP28¹
Inlet Temperature to the Card (°C)	CFM	LFM	Static Pressure	CFM	LFM	Static Pressure
25	2.8	300	0.33	3.0	320	0.25
30	3.3	350	0.41	3.4	360	0.30
35	3.8	400	0.53	3.9	420	0.38
40	4.5	480	0.71	4.6	490	0.49
45	5.3	570	0.97	5.4	580	0.64
50	6.5	690	1.40	6.5	690	0.88
55	7.1	760	1.64	7.1	750	1.02
60	9.0	960	2.53	8.8	940	1.50
A card without SFP28 allocates more power in the FPGA than one with SFP28.